II. Model

General requirement is ensuring safety, easy to detach to observe parts of each model ( devices ) .

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Spatial tructure of DNA molecular model

The whole model has 16 pairs of nucleotides. Height of each cylce is 340mm, diameter: 200mm. the structural components made of  distinguished color PS-HI plastic and PE plastic. Model is sticked on solid base

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The basic movement of chromosomes in mitosis, meiosis1, mitosis, meiosis2

 Including 14 cell models indicating  basic variations of the chromosome in mitosis, meiosis1, mitosis, meiosis2